<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>参考链接：http://www.bootstrapmb.com/item/9613</title>
</head>
<style>
    *,
    *::before,
    *::after {
        padding: 0;
        margin: 0 auto;
        box-sizing: border-box;
    }

    body {
        background-color: #222;
        background-image: radial-gradient(circle at center, #222, #111 300px);
        color: #fff;
        min-height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        perspective: 420px;
        overflow: hidden;
    }

    .flower {
        position: relative;
        transform-style: preserve-3d;
        -webkit-animation: rotateFlower 60s infinite linear;
        animation: rotateFlower 60s infinite linear;
    }

    @-webkit-keyframes rotateFlower {
        to {
            transform: rotateY(360deg);
        }
    }

    @keyframes rotateFlower {
        to {
            transform: rotateY(360deg);
        }
    }

    .leaf {
        position: absolute;
        height: 120px;
        transform-origin: top;
        transform-style: preserve-3d;
        -webkit-clip-path: polygon(0 100%, 50% 0, 100% 100%, 0 100%);
        clip-path: polygon(0 100%, 50% 0, 100% 100%, 0 100%);
        background-image: linear-gradient(#000e, #fff1);
        border-radius: 100px;
        -webkit-animation: leafOpen 12s infinite ease-in-out, ocLeafWidth 6s infinite alternate ease-in-out;
        animation: leafOpen 12s infinite ease-in-out, ocLeafWidth 6s infinite alternate ease-in-out;
    }

    .leaf:nth-child(0) {
        --leafAngle: 0deg;
        -webkit-animation-delay: 0s;
        animation-delay: 0s;
        background-color: #ef8f8f;
    }

    .leaf:nth-child(1) {
        --leafAngle: 30deg;
        -webkit-animation-delay: -0.2s;
        animation-delay: -0.2s;
        background-color: #ef998f;
    }

    .leaf:nth-child(2) {
        --leafAngle: 60deg;
        -webkit-animation-delay: -0.4s;
        animation-delay: -0.4s;
        background-color: #efa38f;
    }

    .leaf:nth-child(3) {
        --leafAngle: 90deg;
        -webkit-animation-delay: -0.6s;
        animation-delay: -0.6s;
        background-color: #efac8f;
    }

    .leaf:nth-child(4) {
        --leafAngle: 120deg;
        -webkit-animation-delay: -0.8s;
        animation-delay: -0.8s;
        background-color: #efb68f;
    }

    .leaf:nth-child(5) {
        --leafAngle: 150deg;
        -webkit-animation-delay: -1s;
        animation-delay: -1s;
        background-color: #efbf8f;
    }

    .leaf:nth-child(6) {
        --leafAngle: 180deg;
        -webkit-animation-delay: -1.2s;
        animation-delay: -1.2s;
        background-color: #efc98f;
    }

    .leaf:nth-child(7) {
        --leafAngle: 210deg;
        -webkit-animation-delay: -1.4s;
        animation-delay: -1.4s;
        background-color: #efd28f;
    }

    .leaf:nth-child(8) {
        --leafAngle: 240deg;
        -webkit-animation-delay: -1.6s;
        animation-delay: -1.6s;
        background-color: #efdc8f;
    }

    .leaf:nth-child(9) {
        --leafAngle: 270deg;
        -webkit-animation-delay: -1.8s;
        animation-delay: -1.8s;
        background-color: #efe68f;
    }

    .leaf:nth-child(10) {
        --leafAngle: 300deg;
        -webkit-animation-delay: -2s;
        animation-delay: -2s;
        background-color: #efef8f;
    }

    .leaf:nth-child(11) {
        --leafAngle: 330deg;
        -webkit-animation-delay: -2.2s;
        animation-delay: -2.2s;
        background-color: #e6ef8f;
    }

    .leaf:nth-child(12) {
        --leafAngle: 360deg;
        -webkit-animation-delay: -2.4s;
        animation-delay: -2.4s;
        background-color: #dcef8f;
    }

    .leaf:nth-child(13) {
        --leafAngle: 390deg;
        -webkit-animation-delay: -2.6s;
        animation-delay: -2.6s;
        background-color: #d2ef8f;
    }

    .leaf:nth-child(14) {
        --leafAngle: 420deg;
        -webkit-animation-delay: -2.8s;
        animation-delay: -2.8s;
        background-color: #c9ef8f;
    }

    .leaf:nth-child(15) {
        --leafAngle: 450deg;
        -webkit-animation-delay: -3s;
        animation-delay: -3s;
        background-color: #bfef8f;
    }

    .leaf:nth-child(16) {
        --leafAngle: 480deg;
        -webkit-animation-delay: -3.2s;
        animation-delay: -3.2s;
        background-color: #b6ef8f;
    }

    .leaf:nth-child(17) {
        --leafAngle: 510deg;
        -webkit-animation-delay: -3.4s;
        animation-delay: -3.4s;
        background-color: #acef8f;
    }

    .leaf:nth-child(18) {
        --leafAngle: 540deg;
        -webkit-animation-delay: -3.6s;
        animation-delay: -3.6s;
        background-color: #a3ef8f;
    }

    .leaf:nth-child(19) {
        --leafAngle: 570deg;
        -webkit-animation-delay: -3.8s;
        animation-delay: -3.8s;
        background-color: #99ef8f;
    }

    .leaf:nth-child(20) {
        --leafAngle: 600deg;
        -webkit-animation-delay: -4s;
        animation-delay: -4s;
        background-color: #8fef8f;
    }

    .leaf:nth-child(21) {
        --leafAngle: 630deg;
        -webkit-animation-delay: -4.2s;
        animation-delay: -4.2s;
        background-color: #8fef99;
    }

    .leaf:nth-child(22) {
        --leafAngle: 660deg;
        -webkit-animation-delay: -4.4s;
        animation-delay: -4.4s;
        background-color: #8fefa3;
    }

    .leaf:nth-child(23) {
        --leafAngle: 690deg;
        -webkit-animation-delay: -4.6s;
        animation-delay: -4.6s;
        background-color: #8fefac;
    }

    .leaf:nth-child(24) {
        --leafAngle: 720deg;
        -webkit-animation-delay: -4.8s;
        animation-delay: -4.8s;
        background-color: #8fefb6;
    }

    .leaf:nth-child(25) {
        --leafAngle: 750deg;
        -webkit-animation-delay: -5s;
        animation-delay: -5s;
        background-color: #8fefbf;
    }

    .leaf:nth-child(26) {
        --leafAngle: 780deg;
        -webkit-animation-delay: -5.2s;
        animation-delay: -5.2s;
        background-color: #8fefc9;
    }

    .leaf:nth-child(27) {
        --leafAngle: 810deg;
        -webkit-animation-delay: -5.4s;
        animation-delay: -5.4s;
        background-color: #8fefd2;
    }

    .leaf:nth-child(28) {
        --leafAngle: 840deg;
        -webkit-animation-delay: -5.6s;
        animation-delay: -5.6s;
        background-color: #8fefdc;
    }

    .leaf:nth-child(29) {
        --leafAngle: 870deg;
        -webkit-animation-delay: -5.8s;
        animation-delay: -5.8s;
        background-color: #8fefe6;
    }

    .leaf:nth-child(30) {
        --leafAngle: 900deg;
        -webkit-animation-delay: -6s;
        animation-delay: -6s;
        background-color: #8fefef;
    }

    .leaf:nth-child(31) {
        --leafAngle: 930deg;
        -webkit-animation-delay: -6.2s;
        animation-delay: -6.2s;
        background-color: #8fe6ef;
    }

    .leaf:nth-child(32) {
        --leafAngle: 960deg;
        -webkit-animation-delay: -6.4s;
        animation-delay: -6.4s;
        background-color: #8fdcef;
    }

    .leaf:nth-child(33) {
        --leafAngle: 990deg;
        -webkit-animation-delay: -6.6s;
        animation-delay: -6.6s;
        background-color: #8fd2ef;
    }

    .leaf:nth-child(34) {
        --leafAngle: 1020deg;
        -webkit-animation-delay: -6.8s;
        animation-delay: -6.8s;
        background-color: #8fc9ef;
    }

    .leaf:nth-child(35) {
        --leafAngle: 1050deg;
        -webkit-animation-delay: -7s;
        animation-delay: -7s;
        background-color: #8fbfef;
    }

    .leaf:nth-child(36) {
        --leafAngle: 1080deg;
        -webkit-animation-delay: -7.2s;
        animation-delay: -7.2s;
        background-color: #8fb6ef;
    }

    .leaf:nth-child(37) {
        --leafAngle: 1110deg;
        -webkit-animation-delay: -7.4s;
        animation-delay: -7.4s;
        background-color: #8facef;
    }

    .leaf:nth-child(38) {
        --leafAngle: 1140deg;
        -webkit-animation-delay: -7.6s;
        animation-delay: -7.6s;
        background-color: #8fa3ef;
    }

    .leaf:nth-child(39) {
        --leafAngle: 1170deg;
        -webkit-animation-delay: -7.8s;
        animation-delay: -7.8s;
        background-color: #8f99ef;
    }

    .leaf:nth-child(40) {
        --leafAngle: 1200deg;
        -webkit-animation-delay: -8s;
        animation-delay: -8s;
        background-color: #8f8fef;
    }

    .leaf:nth-child(41) {
        --leafAngle: 1230deg;
        -webkit-animation-delay: -8.2s;
        animation-delay: -8.2s;
        background-color: #998fef;
    }

    .leaf:nth-child(42) {
        --leafAngle: 1260deg;
        -webkit-animation-delay: -8.4s;
        animation-delay: -8.4s;
        background-color: #a38fef;
    }

    .leaf:nth-child(43) {
        --leafAngle: 1290deg;
        -webkit-animation-delay: -8.6s;
        animation-delay: -8.6s;
        background-color: #ac8fef;
    }

    .leaf:nth-child(44) {
        --leafAngle: 1320deg;
        -webkit-animation-delay: -8.8s;
        animation-delay: -8.8s;
        background-color: #b68fef;
    }

    .leaf:nth-child(45) {
        --leafAngle: 1350deg;
        -webkit-animation-delay: -9s;
        animation-delay: -9s;
        background-color: #bf8fef;
    }

    .leaf:nth-child(46) {
        --leafAngle: 1380deg;
        -webkit-animation-delay: -9.2s;
        animation-delay: -9.2s;
        background-color: #c98fef;
    }

    .leaf:nth-child(47) {
        --leafAngle: 1410deg;
        -webkit-animation-delay: -9.4s;
        animation-delay: -9.4s;
        background-color: #d28fef;
    }

    .leaf:nth-child(48) {
        --leafAngle: 1440deg;
        -webkit-animation-delay: -9.6s;
        animation-delay: -9.6s;
        background-color: #dc8fef;
    }

    .leaf:nth-child(49) {
        --leafAngle: 1470deg;
        -webkit-animation-delay: -9.8s;
        animation-delay: -9.8s;
        background-color: #e68fef;
    }

    .leaf:nth-child(50) {
        --leafAngle: 1500deg;
        -webkit-animation-delay: -10s;
        animation-delay: -10s;
        background-color: #ef8fef;
    }

    .leaf:nth-child(51) {
        --leafAngle: 1530deg;
        -webkit-animation-delay: -10.2s;
        animation-delay: -10.2s;
        background-color: #ef8fe6;
    }

    .leaf:nth-child(52) {
        --leafAngle: 1560deg;
        -webkit-animation-delay: -10.4s;
        animation-delay: -10.4s;
        background-color: #ef8fdc;
    }

    .leaf:nth-child(53) {
        --leafAngle: 1590deg;
        -webkit-animation-delay: -10.6s;
        animation-delay: -10.6s;
        background-color: #ef8fd2;
    }

    .leaf:nth-child(54) {
        --leafAngle: 1620deg;
        -webkit-animation-delay: -10.8s;
        animation-delay: -10.8s;
        background-color: #ef8fc9;
    }

    .leaf:nth-child(55) {
        --leafAngle: 1650deg;
        -webkit-animation-delay: -11s;
        animation-delay: -11s;
        background-color: #ef8fbf;
    }

    .leaf:nth-child(56) {
        --leafAngle: 1680deg;
        -webkit-animation-delay: -11.2s;
        animation-delay: -11.2s;
        background-color: #ef8fb6;
    }

    .leaf:nth-child(57) {
        --leafAngle: 1710deg;
        -webkit-animation-delay: -11.4s;
        animation-delay: -11.4s;
        background-color: #ef8fac;
    }

    .leaf:nth-child(58) {
        --leafAngle: 1740deg;
        -webkit-animation-delay: -11.6s;
        animation-delay: -11.6s;
        background-color: #ef8fa3;
    }

    .leaf:nth-child(59) {
        --leafAngle: 1770deg;
        -webkit-animation-delay: -11.8s;
        animation-delay: -11.8s;
        background-color: #ef8f99;
    }

    .leaf:nth-child(60) {
        --leafAngle: 1800deg;
        -webkit-animation-delay: -12s;
        animation-delay: -12s;
        background-color: #ef8f8f;
    }

    @-webkit-keyframes leafOpen {
        from {
            transform: translateZ(-30px) rotate(var(--leafAngle)) rotateX(-90deg) rotateY(-15deg);
        }

        to {
            transform: translateZ(30px) rotate(var(--leafAngle)) rotateX(90deg) rotateY(45deg);
        }
    }

    @keyframes leafOpen {
        from {
            transform: translateZ(-30px) rotate(var(--leafAngle)) rotateX(-90deg) rotateY(-15deg);
        }

        to {
            transform: translateZ(30px) rotate(var(--leafAngle)) rotateX(90deg) rotateY(45deg);
        }
    }

    @-webkit-keyframes ocLeafWidth {
        from {
            width: 0;
        }

        to {
            width: 60px;
        }
    }

    @keyframes ocLeafWidth {
        from {
            width: 0;
        }

        to {
            width: 60px;
        }
    }
</style>

<body>
    <div class="flower">
        <div class="leaf"></div>
        <div class="leaf"></div>
        <div class="leaf"></div>
        <div class="leaf"></div>
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    </div>
</body>

</html>